[onebad82z]

This excerpt is from a David Vizard article on mail order carbs (AED Performance) over on www.gofastnews.com in which he states for track tuning...

"Dialing the ignition in should be no big deal. Start with it a little on the retarded side then work on the carb jetting first. Do not do things around the other way. The flame speed changes with the mixture ratio so the optimal timing will be slightly different for any jetting more than about 4 numbers or more off optimum. Once the carb has been optimally jetted the ignition can be progressively advanced until the best setting is found."

Would this be a wise way to begin tuning my car when I get back to the strip? Is this a sensible way to dial the carb in for a mainly (90%) street driven car that sees occasional (10%) track outings? Or will this leave me overly rich for street driving....

If I follow his advice should I start with say 34 degrees total timing and dial the carb in, then advance timing till I no longer see gains? At that point do you go back and play with carb again, then back to timing? Or just as he states?

 

[Bob West]

Start with timing, 36-38* total, then jet for mph, then go back and move timing to 40-42 if it slows go the other way with the timing. Timing will change jetting requirements.

 

[onebad82z]

Start with timing, 36-38* total, then jet for mph, then go back and move timing to 40-42 if it slows go the other way with the timing. Timing will change jetting requirements.

Thank you!